Reproducing Steps

1. deploy a zss EE app WAR (2.6.0 freshly 20140115) file to Tomcat 6
2. start Tomcat 6
3. Stop Tomcat 6

The Tomcat's console shows up the log messages like the following:

嚴重的: The web application [/zssapp] created a ThreadLocal with key of type [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1] (value [org.apache.xmlbeans.impl.schema.SchemaTypeLoaderImpl$1@626664fc]) and a value of type [java.util.ArrayList] (value [[java.lang.ref.SoftReference@30700edc]]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2013/11/5 上午 11:11:10 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
嚴重的: The web application [/zssapp] created a ThreadLocal with key of type [org.apache.xmlbeans.impl.store.Locale$1] (value [org.apache.xmlbeans.impl.store.Locale$1@cdfa65c]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@2f22e89e]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2013/11/5 上午 11:11:10 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
嚴重的: The web application [/zssapp] created a ThreadLocal with key of type [org.apache.xmlbeans.impl.store.CharUtil$1] (value [org.apache.xmlbeans.impl.store.CharUtil$1@1cd5f53f]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@22d809e3]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.
2013/11/5 上午 11:11:10 org.apache.catalina.loader.WebappClassLoader clearThreadLocalMap
嚴重的: The web application [/zssapp] created a ThreadLocal with key of type [org.apache.xmlbeans.XmlBeans$1] (value [org.apache.xmlbeans.XmlBeans$1@157127f4]) and a value of type [java.lang.ref.SoftReference] (value [java.lang.ref.SoftReference@37f60f2b]) but failed to remove it when the web application was stopped. This is very likely to create a memory leak.